Omron CJ2 - System Configuration Example

2-23
2 Basic System Configuration and Devices
CJ2 CPU Unit Hardware User’s Manual
2-2 Expanded System Configuration
2
2-2-1 Serial Communications
The host computer or a Programming Device such as the CX-Programmer is connected via the built-in
serial communications port on the CPU Unit. In addition, up to 15 Serial Communications Units can be
connected to a single CPU Unit, making it possible to configure a flexible serial communications system
by connecting devices with RS-232C or RS-422/485 ports (such as PLCs from other manufacturers,
temperature controllers, bar code readers, ID systems, personal computers, board computers, and
components).
For details on the protocol modes that can be selected for each port, refer to 11-2-1 Overview of Serial
Communications in the CJ2 CPU Unit Software User’s Manual (Cat. No. W473).
Additional Information
Use the Peripheral Bus to connect the CJ2 CPU Unit to the CX-Programmer via serial communi-
cations.
System Configuration Example
RS-232C
RS-232C
PT
CX-Programmer
or host
computer
NT Link
CPU Unit
Peripheral Bus
(Toolbus)
Host Link slave
Serial
Communications Units
CompoWay/F master
Modbus master
Host Link master
Protocol macro
No protocol
Device supporting
CompoWay/F
Device supporting
Modbus
CPU Unit
Host Link slave
General-purpose external device (e.g., such as a
PLC from other manufacturer, temperature
controller, or bar code reader)
: Protocol
This is connected using the Serial Gateway. The Serial
Gateway is supported for Serial Communications Units
with unit version 1.2 or later.